Randomly pick a movie from a given directory based on various optional input parameters.

popcorntime.sh

#!/bin/bash
#title           :  popcorntime.sh
#description     :  This script picks a random movie from a given directory based on various input parameters.
#author          :  dewey
#date            :  17.02.2014


# Initialise some variables
quality=
extension=
medium=
path=
needles=()
SUCCESS="You should watch: "

function printhelp
{
    echo "Usage: popcorntime /path/to/movies"
    echo "OR     popcorntime [[-p | --path] (mandatory) | [-q | --quality] [-e | --extension] [-m | --medium]]"
    echo "OR     popcorntime [-h | --help]"
}

# If there are !1 arguments parse the arguments and do things...
if [ $# -ne 1 ]
then
  while [ "$1" != "" ]; do
      case $1 in
          -q | --quality )        shift
                                  quality=$1
                                  ;;
          -e | --extension )      shift
                                  extension=$1
                                  ;;
          -m | --medium )         shift
                                  medium=$1
                                  ;;
          -p | --path )           shift
                                  path=$1
                                  ;;
          -h | --help )           usage
                                  exit
                                  ;;
          * )                     printhelp
                                  exit 1
      esac
      shift
  done
  
  # If the arguments are requested add needle to our needles array
  if [[ ! "$quality" == "" ]]
  then
    needles+=(-iname "*$quality*")
  fi

  if [[ ! "$extension" == "" ]]
  then
    needles+=(-iname "*$extension*")
  fi

  if [[ ! "$medium" == "" ]]
  then
    needles+=(-iname "*$medium*")
  fi

  # Add all the needles to our find command
  echo $SUCCESS
  find "$path" "${needles[@]}" -type f -exec basename {} \; | gshuf -n 1

# If there's only one argument (The path to the movie directory), just pick one random movie.
else
  if [[ -d $1 ]]
  then
    echo $SUCCESS
    find "$1" -type f -exec basename {} \; | gshuf -n 1
  fi
fi